{"id":"CVE-2021-28860","title":"In Node.js mixme, prior to v0.5.1, an attacker can add or alter properties of an object via '__proto__' through the mutate() and merge() functions","summary":"In Node.js mixme, prior to v0.5.1, an attacker can add or alter properties of an object via '__proto__' through the mutate() and merge() functions. The polluted attribute will be directly assigned to every object in the program. This wil…","severity":"critical","cvss":9.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","cwe":["CWE-1321"],"vendor":"adaltas","product":"mixme","affected":["mixme < 0.5.1"],"patched":["mixme 0.5.1"],"published":"2021-05-03","updated":"2026-07-05","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2021-28860","references":[{"url":"https://github.com/adaltas/node-mixme/commit/cfd5fbfc32368bcf7e06d1c5985ea60e34cd4028","label":"cve@mitre.org"},{"url":"https://github.com/adaltas/node-mixme/issues/1","label":"cve@mitre.org"},{"url":"https://github.com/adaltas/node-mixme/security/advisories/GHSA-79jw-6wg7-r9g4","label":"cve@mitre.org"},{"url":"https://security.netapp.com/advisory/ntap-20210618-0005/","label":"cve@mitre.org"},{"url":"https://www.npmjs.com/~david","label":"cve@mitre.org"},{"url":"http://nodejs.com","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/adaltas/node-mixme/commit/cfd5fbfc32368bcf7e06d1c5985ea60e34cd4028","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/adaltas/node-mixme/issues/1","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/adaltas/node-mixme/security/advisories/GHSA-79jw-6wg7-r9g4","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20210618-0005/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.npmjs.com/~david","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.01843,"epssPercentile":0.78075,"ingestedAt":"2026-07-05T00:59:25.852Z","slug":"CVE-2021-28860","body":"## Overview\n\nIn Node.js mixme, prior to v0.5.1, an attacker can add or alter properties of an object via '__proto__' through the mutate() and merge() functions. The polluted attribute will be directly assigned to every object in the program. This will put the availability of the program at risk causing a potential denial of service (DoS).\n\n## Affected\n\n- `mixme < 0.5.1`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `mixme 0.5.1`","depth":"midnight","depthScore":50,"depthScoreParts":{"impact":50.1,"likelihood":0.4,"exploitation":0,"ransomware":0},"changes":[]}